Utilizing Organic Precipitant Patents (Class 210/725)
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Patent number: 11472723Abstract: The invention provides a method for removing a dissolved heavy metal from an aqueous solution. The method comprises dissolving in the aqueous solution a foaming agent of formula (I) or a salt thereof. The method further comprises passing a gas through the aqueous solution to form a foam and separating the foam from the aqueous solution.Type: GrantFiled: October 20, 2017Date of Patent: October 18, 2022Assignee: NewSouth Innovations Pty LimitedInventors: Richard Mark Pashley, Abul Fazal Mohammed Mokhlesur Rahman, Fatemeh Makavipour, Mojtaba Taseidifar
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Patent number: 10934189Abstract: Disclosed are methods and compositions for coagulating and clarifying produced waters for use as boiler feed waters, for example for the generation of steam. The methods and compositions are especially useful for treatment of produced waters from steam-injection methods of tertiary oil recovery such as steam-assisted gravitational drainage. Disclosed are compositions comprising a first copolymer having a high molecular weight and bearing a low molar cationic charge and a second copolymer having a lower molecular weight and bearing a high molar cationic charge. The compositions are suitable for addition as coagulants to produced waters that have been treated by warm lime softening. Also disclosed are methods of treating produced waters from steam-injection oil recovery for use as boiler feed waters to generate steam in such steam injection methods.Type: GrantFiled: October 17, 2017Date of Patent: March 2, 2021Assignee: Ecolab USA Inc.Inventors: Jason R. Burney, Michael J. Murcia
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Patent number: 10464834Abstract: A multi stage process for the separation of bio-components from grease trap waste and animal waste materials is disclosed. Targeted polymers are added to the source and separated streams prior to passing the streams through separation equipment including a rotary screen, one or more presses, a dissolved air floatation device and a clarifier in which the waste stream is separated into a stream containing predominantly oil, grease and protein, a stream containing predominantly water and a stream that predominantly contains fibers.Type: GrantFiled: July 4, 2015Date of Patent: November 5, 2019Inventor: Aicardo Roa-Espinosa
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Patent number: 10183882Abstract: The system and method for pretreating turbid seawater utilizes polyelectrolyte dosing, clarification through a clarifier system and centrifugation in a decanter centrifuge followed by microfiltration to treat seawater prior to its injection through a desalination plant. The system for pretreating turbid seawater includes a static mixer for mixing a polyelectrolyte with a stream of turbid seawater to produce a polyelectrolyte-treated seawater mixture. At least one clarifier tank is in fluid communication with the static mixer for receiving the polyelectrolyte-treated seawater mixture and removing a first portion of solids therefrom to produce a clarified seawater mixture. A decanter centrifuge is in fluid communication with the at least one clarifier tank for receiving the clarified seawater mixture and removing a second portion of solids therefrom to produce centrifuged seawater.Type: GrantFiled: May 1, 2018Date of Patent: January 22, 2019Assignee: Kuwait Institute for Scientific ResearchInventors: Yousef Al-Wazzan, Mansour Ahmed, Abbas Al-Mesri, Mohamed Al-Tabtabaei
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Patent number: 9631256Abstract: This alkali metal and/or alkali earth metal extraction method is superior in terms of cost and allows repeated use of the aqueous solution that extracts alkali metal and/or alkali earth metal from a solid. This method is for extracting alkali metal and/or alkali earth metal from a solid containing an alkali metal and/or alkali earth metal, and involves an elution step in which the solid is added to an amino acid-containing aqueous solution, and the alkali metal and/or alkali earth metal is eluted into the amino acid-containing aqueous solution.Type: GrantFiled: July 4, 2013Date of Patent: April 25, 2017Assignee: AISIN SEIKI KABUSHIKI KAISHAInventor: Yoshiki Wakimoto
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Patent number: 9371489Abstract: The present invention relates to compositions comprising a plant material and methods for using the same. The methods include extracting or removing a substance from a substrate, or remediating a substrate from a substance. The substance can comprise a hydrocarbon-containing substance, a protein, lipid, wax, fatty acid or fatty alcohol, or a combination thereof.Type: GrantFiled: March 15, 2013Date of Patent: June 21, 2016Assignee: GreenStract, LLCInventor: Peter Rehage
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Patent number: 9315849Abstract: Methods and compositions for the preparation of soil samples and the determination of the number of microbes within a soil sample are disclosed. The methods include measuring, solubilizing, bleaching and filtering soil samples and measuring the turbidity of the filtered solution. The turbidity of the sample can be determined by visual inspection of a Secchi disk viewed through the column liquid sample in a transparent tubular cylinder, or by using a cell phone camera and application. Devices and kits for the rapid, cost efficient determination of microbial numbers in the field setting are disclosed. The disclosed devices and methods can also be used for applications other than determination of microbial numbers.Type: GrantFiled: April 1, 2014Date of Patent: April 19, 2016Assignee: Prolific Earth Sciences CorporationInventors: Judith Fitzpatrick, James Sottilo, Austin Lin, Brady Trexler
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Patent number: 9254453Abstract: Method for removing hydrogen sulfide from fluids such as oil and gas well drilling, treatment, and production fluids and effluents from hydrocarbon operations and mineral mining operations. The sulfide scavenger used in the method is a gluconate salt other than ferrous gluconate. The gluconate salt is added to the fluid along with an iron source if iron is not already in the fluid. The gluconate reacts with the iron and forms iron gluconate in the fluid, which in turn reacts with the hydrogen sulfate to form iron sulfide which may be readily removed from the fluid.Type: GrantFiled: March 6, 2013Date of Patent: February 9, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Cato Russell McDaniel, Carl J. Thaemlitz
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Publication number: 20150044733Abstract: A method of separating a lignin-rich solid phase from a solution, comprising: pretreating a lignocellulosic biomass with a pretreatment fluid having to remove soluble components, colloidal material and primarily lignin containing particles; separating the pretreated lignocellulosic biomass from the pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles; flocculating the separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles using PEO or CPAM as a flocculating agent; and filtering the flocculated separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles to remove agglomerates.Type: ApplicationFiled: March 15, 2013Publication date: February 12, 2015Applicant: The Research Foundation for The State University of New YorkInventors: Lakshmi Rakesh Kumar Yasarla, Bandaru V. Ramarao, Thomas Amidon
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Patent number: 8858802Abstract: Methods of deoiling oily water such as SAGD and frac produce water. The oily water is treated with a natural coagulant selected from tannins and chitosan. A cationic and/or anionic flocculant may also be added to the treated oily water. The thus treated oily water may be subjected to conventional mechanical oil separation techniques such as hydrocyclonic separation, dissolved air flotation, entrapped air flotation, induced gas flotation, gravity filters, reverse osmosis filters, API, or Voraxial® bulk separators and the like.Type: GrantFiled: December 18, 2009Date of Patent: October 14, 2014Assignee: General Electric CompanyInventors: David M. Polizzotti, Abdul Rafi Khwaja
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Publication number: 20140263058Abstract: A method and system for treating waste water from hydraulic fracturing is disclosed. The treatment includes removing the sand, suspending the inorganic metals and impurities, using flocculation to engulf the impurities, and separating the impurities from the water, resulting in pure water that can be reused in the process.Type: ApplicationFiled: March 7, 2014Publication date: September 18, 2014Inventor: Richard H. Fagher
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Publication number: 20140166583Abstract: A stream of acid mine discharge is treated by mixing an alkaline aqueous solution of sodium borohydride to form a precipitate which is separated from the stream.Type: ApplicationFiled: December 11, 2013Publication date: June 19, 2014Inventor: James George Clements
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Patent number: 8728326Abstract: The invention relates to a polymer comprising structural units of formula and formula wherein R1, R2, R5 and R6 are independently hydrogen, a methyl group, or —COOH, only one of R1 and R2 or R5 and R6 is —COOH; R3 and R7 are independently hydrogen, or a methyl group; R4 is —COOH, —CONH2 or —OH, when R4 is —OH, R1, R2 and R3 are respectively hydrogen; and R8 is —COO, —CONH, or —O—, when R8 is —O—, R5, R6 and R7 are respectively hydrogen. Methods for preparing and using the polymer are also described herein.Type: GrantFiled: March 29, 2011Date of Patent: May 20, 2014Assignee: General Electric CompanyInventors: Wenqing Peng, Yangang Liang, Shengxia Liu, Larry Neil Lewis, Robert James Perry, Stephen Robert Vasconcellos, Su Lu, Guixi Zhang
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Publication number: 20140117273Abstract: A method uses anionic and cationic polymers added in, any order or simultaneously, to aqueous media for the removal of substances. The sequential addition of the two biopolymers, anionic xanthan, followed by cationic chitosan, causes the rapid formation of very large and cohesive fibrillar aggregates that may exhibit high solids to liquid ratios and that quickly settle out from the aqueous media. The aqueous media can be easily separated from the large fibrillar aggregates by settling under gravity or by filtration through a porous containment device, such as a synthetic or non-synthetic woven or non-woven fabric including a geotextile fabric or a solid containment device containing a solid mesh screen.Type: ApplicationFiled: January 3, 2014Publication date: May 1, 2014Applicant: HALOSOURCE, INC.Inventors: Everett J. Nichols, James R. Scott, Jeffrey F. Williams, Yongjun Chen
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Publication number: 20140008305Abstract: A method includes the steps, adding divalent calcium to an aqueous medium containing sulfate anions in solution and forming insoluble calcium sulfate in the aqueous medium; adding a water-soluble chitosan to the aqueous medium and forming a chitosan sulfate complex; adding a water-soluble anionic polymer to the aqueous medium to form aggregates comprising the chitosan sulfate complex with the anionic polymer; andremoving the aggregates from the aqueous medium to remove the sulfate anions.Type: ApplicationFiled: June 4, 2013Publication date: January 9, 2014Applicant: HALOSOURCE, INC.Inventors: Everett J. Nichols, James R. Scott
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Patent number: 8591744Abstract: The current invention relates to composition and method for treating impurities in a circulating water system. The circulating water system impurities may be oversprayed paint in paint spray booth applications. The composition includes an aqueous solution of a cationized starch, a polybasic aluminum salt such as aluminum chlorohydrate or polyaluminum chloride and a solution of a medium to high MW aqueous flocculent. The composition is particularly useful when added to recirculating scrubber water in paint spray booths for effectively treating both water based and solvent based paints.Type: GrantFiled: June 24, 2009Date of Patent: November 26, 2013Assignee: Nalco CompanyInventors: Joseph P. Miknevich, David W. Scheimann
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Patent number: 8580917Abstract: The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.Type: GrantFiled: December 10, 2012Date of Patent: November 12, 2013Assignee: The University of AkronInventor: Judit E Puskas
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Patent number: 8529155Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.Type: GrantFiled: March 15, 2012Date of Patent: September 10, 2013Assignee: FracPure Holdings LLCInventors: Frank A. DiTommaso, Peter N. DiTommaso
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Publication number: 20130056422Abstract: The present invention is to a process for reducing and removing organic phosphorus acid from waste stream. The process involves adding a multivalent metal salt to the waste stream and adjusting the pH level of the waste stream to an optimum level to maximize the removal of organic phosphorus acid.Type: ApplicationFiled: September 1, 2011Publication date: March 7, 2013Applicant: Celanese International CorporationInventors: Michael Combs, Denis Fallon
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Patent number: 8383764Abstract: The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.Type: GrantFiled: May 17, 2007Date of Patent: February 26, 2013Assignee: The University of AkronInventor: Judit E. Puskas
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Patent number: 8323509Abstract: A method of rehabilitation of a deposition area to render it suitable for plant growth comprising a particulate mineral material, which particulate mineral material has been dewatered from a suspension of said material, comprising the steps of transferring the suspension of particulate mineral material as a fluid to the deposition area, and in which the suspension is allowed to stand and dewater at the deposition area to form a dewatered particulate mineral material, wherein the rehabilitation of the disposal area is achieved by adding a dewatering amount of a polymer to the suspension of the particulate mineral material while it is being transferred as a fluid to the deposition area, wherein the polymer is either a synthetic water-soluble polymer formed from one or more ethylenically unsaturated monomers having an intrinsic viscosity of at least 4 dl/g or a water-soluble polymer that is a natural polymer or semi natural polymer.Type: GrantFiled: May 1, 2007Date of Patent: December 4, 2012Assignee: BASF SEInventors: Brian Dymond, John Gerard Bellwood
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Patent number: 8313654Abstract: Methods for aggregating suspended solid particles in an aqueous medium involving mixing the aqueous medium with an effective amount of a flocculant to aggregate the solid particles to form aggregated solid particles, and optionally separating the aggregated solid particles from the aqueous medium. The flocculant is obtained from animal blood. The pH of the aqueous medium may be adjusted to a pH of about 4.5 to about 5.7 by the addition of at least one acid or acidic buffer. The temperature of the aqueous medium may be adjusted to a temperature range of about 10° to about 50° C.Type: GrantFiled: August 19, 2010Date of Patent: November 20, 2012Assignee: The United States of America, as represented by the Secretary of AgricultureInventors: George Piazza, Rafael Garcia
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Patent number: 8282835Abstract: The invention provides a method of efficiently removing selenium from water. The method involves: adding an oxidant to the liquid, adjusting the liquid's pH to below 7.5, adding ferric salt in an amount such that less than a quarter of selenium in the liquid precipitates and adding a poly dithiocarbamate material to the liquid in an amount such that the amount of poly dithiocarbamate material (in ppm) is greater than the amount of ferric salt (in ppm). This method removes far more selenium than previous methods, and does it using a smaller amount of expensive chemicals. Moreover this method makes it far more likely to achieve cost effective compliance with the ever-increasing environmental standards for selenium in water.Type: GrantFiled: March 10, 2010Date of Patent: October 9, 2012Assignee: Nalco CompanyInventors: Daniel E. Schwarz, Jitendra T. Shah
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Patent number: 8273320Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.Type: GrantFiled: March 15, 2012Date of Patent: September 25, 2012Assignee: FracPure Holdings LLCInventors: Frank A. DiTommaso, Peter N. DiTommaso
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Patent number: 8241503Abstract: Disclosed is an economical process for the purification of water containing soluble and sparingly soluble inorganic compounds using single-stage or two-stage membrane processes that integrate membrane water purification with chemical precipitation softening and residual hardness and silica removal from the membrane concentrates using ion exchange resins and silica sequestering media, respectively.Type: GrantFiled: July 18, 2011Date of Patent: August 14, 2012Inventor: Riad Al-Samadi
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Patent number: 8236180Abstract: Disclosed is a boron adsorbent having an excellent adsorbing ability against boron contained in a solution, which is inexpensive and has high general versatility. Also disclosed is a boron removal method which can remove boron efficiently in a simple manner. An amide derivative represented by the general formula (1) is added to a boron-containing water under alkaline conditions to cause the adsorption of boron to the amide derivative. Then, a cation source having two or more valencies is added to the water to cause the aggregation of the amide body. The aggregated amide body is removed from the water. In the general formula (1), m represents 1 or 2; X represents —CH2OH, —CHO or —COOH; n represents an integer of 2 to 5; X are independent from each other and n are independent from each other when m represents 2; and Y represents a monovalent hydrocarbon group having 6 to 16 carbon atoms when m is 1, and represents a divalent hydrocarbon group having 8 to 18 carbon atoms when m is 2.Type: GrantFiled: May 21, 2008Date of Patent: August 7, 2012Assignee: Kowa Company, Ltd.Inventor: Katsumi Yabusaki
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Patent number: 8158097Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.Type: GrantFiled: June 25, 2010Date of Patent: April 17, 2012Assignee: FracPure Holdings LLCInventors: Frank A. DiTommaso, Peter N. DiTommaso
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Patent number: 8147703Abstract: The invention relates to a method for processing sludge, comprising the addition of a lime-based basic agent to a sludge having a first pH value in order to raise the pH to a second value higher than the first one, adding at least one anionic organic flocculating agent that is active at said second pH value, flocculating the sludge, and separating the flocculated sludge between dehydrated sludge and a liquid phase, wherein the sludge to be dehydrated has a first above-mentioned pH value lower than 9, while the lime-based basic agent induces said pH raise to said above-mentioned second value within less than 5 minutes. The invention also relates to a composition for implementing said processing.Type: GrantFiled: November 13, 2007Date of Patent: April 3, 2012Assignee: S.A. Lhoist Recherche et DeveloppementInventor: Marc Joseph Henri Remy
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Patent number: 8147696Abstract: A method for purifying a water process stream whereby a precipitating agent is added to the water process stream to elevate the process stream pH to at least 10.5 to drop out precipitates which form separated solids comprising at least one of calcium precipitate, magnesium precipitate, barium precipitate, strontium precipitate, and silica precipitate. The separated solids are then coagulated and removed from the water process stream so as to yield a purified water process stream.Type: GrantFiled: September 19, 2006Date of Patent: April 3, 2012Inventor: Ken V. Pandya
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Patent number: 8137567Abstract: A method for fluid remediation and removing particulates from an aqueous stream is described herein. The method can use a separation component and a clarifier component. A slurry can flow to a scalping shaker which can separate the slurry, forming a first effluent. The first effluent can flow from the scalping shaker to a first section and can be agitated. The first effluent can be pumped to a mud cleaner and cleaned, forming a second effluent. The second effluent can flow into a second section and can be agitated. The second effluent can be pumped to a desilter and can be desilted, forming a third effluent. The third effluent can flow to a third section. The third effluent can be pumped to a second tank of the clarifier component. The third effluent can be decelerated within the second tank, forming a clean effluent.Type: GrantFiled: November 19, 2010Date of Patent: March 20, 2012Assignee: Tri-Flo International, Inc.Inventor: Edward Beverly Moe
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Patent number: 8119011Abstract: Substitution of a single Ga-atom or single Ge-atom (GaAl12 and GeAl12 respectively) into the center of an aluminum Keggin polycation (Al13) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAl12 consistently shows ˜1 order of magnitude increase in pathogen reduction, compared to Al13. At a concentration of 2 ppm, GaAl12 performs equivalently to 40 ppm alum, removing ˜90% of the dissolved organic material. The substituted GaAl12 product also offers extended shelf-life and consistent performance. We also synthesized a related polyaluminum chloride compound made of pre-hydrolyzed dissolved alumina clusters of [GaO4Al12(OH)24(H2O)12]7+.Type: GrantFiled: February 11, 2009Date of Patent: February 21, 2012Assignee: Sandia CorporationInventors: May D. Nyman, Thomas A. Stewart
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Publication number: 20120037569Abstract: A method of removing mineral hardness of water comprises selecting a mineral hardness solubility constant modifier capable of at least partially precipitating insoluble mineral hardness material from water containing mineral hardness. A pressurized flow of the water containing mineral hardness is generated. The mineral hardness solubility constant modifier is added to the pressurized flow of water containing mineral hardness to form water bearing precipitate mineral hardness. The water bearing precipitate mineral hardness is filtered to at least partially remove the precipitated insoluble mineral hardness material from the water bearing precipitate mineral hardness to form post-filtered water.Type: ApplicationFiled: August 16, 2011Publication date: February 16, 2012Inventor: David MORGAN
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Patent number: 8101085Abstract: Described is a process for treating an animal husbandry effluent slurry, such as hog manure, containing suspended solid particles. The process includes a) providing a liquid portion of the effluent, b) diluting the liquid to a Newtonian fluid, c) assuring the pH is under 10, d) adding to the fluid i) a soluble salt of alkaline earth metal (e.g. CaCl2) and ii) an insoluble basic salt of the same alkaline earth metal (e.g. CaCO3) to balance available cations and promote agglomeration of the suspended solid particles, e) adding a cationic coagulant to obtain a pre-treated destabilized colloid mixture with zero zeta potential value, and f) performing electroflotation to obtain a treated liquid and floated solids.Type: GrantFiled: May 8, 2008Date of Patent: January 24, 2012Assignee: Agriculture and Agri-Food CanadaInventors: Simon Guertin, Daniel Massé, François Lamarche
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Publication number: 20120006755Abstract: Provided is a process for efficiently removing an azole-type anticorrosive for copper from water containing the azole-type anticorrosive for copper, such as wastewater discharged from a CMP step in a fabrication process of a semiconductor device. Ferrous ions are added to water containing an azole-type anticorrosive for copper, and a resulting insoluble iron-azole complex is separated. After the insoluble iron-azole complex is separated, the remaining TOC components are subjected to ozonolysis. The azole-type anticorrosive for copper can be efficiently insolubilized in the form of an iron-azole complex using ferrous ions, and flocculation/solid-liquid separation can be performed. The water after removal of the insoluble matter formed by the addition of ferrous ions is water from which not only the azole-type anticorrosive for copper but also suspended solids have been removed.Type: ApplicationFiled: October 21, 2009Publication date: January 12, 2012Applicant: KURITA WATER INDUSTRIES LTD.Inventors: Tomoharu Yasuike, Atsushi Nemoto
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Patent number: 8048314Abstract: The present invention provides a method and an apparatus for treating a chlorine-containing waste, which can separate and recover a chlorine component from a chlorine-containing waste, and also can achieve a high chlorine removal thereby obtaining a high purity chlorine compound, and can decrease the amount of water for recovering chlorine.Type: GrantFiled: October 16, 2006Date of Patent: November 1, 2011Assignees: Sumitomo Osaka Cement Co., Ltd., Japan Water Systems CorporationInventors: Masayoshi Konishi, Hideho Hayashi, Ikuko Watanabe, Takehiko Itoh, Takayuki Kuroiwa, Taichiro Fujimaki
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Patent number: 7998439Abstract: A separation and recycling method for recycling uranium and fluoride from a waste liquid sequentially and separately is disclosed. The method comprises a uranium-recycling process and a fluoride-recycling process. In the uranium-recycling process, an alkali metal compound or monovalent cation and a coagulant aid are added into the waste liquid to promote the precipitation of uranium. In the fluoride-recycling process, an alkaline earth metal compound, a strong acid and a coagulant aid are added into the uranium-removed waste liquid to precipitate fluoride. By means of the method of the present invention, the uranium and fluoride contents of the uranium-removed and fluoride-removed waste liquid are compliant with the effluent standards of the environmental laws.Type: GrantFiled: December 29, 2009Date of Patent: August 16, 2011Assignee: Institute of Nuclear Energy ResearchInventors: Chen-Te Lin, Kuo-Hao Tsao, Ben-Li Pen
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Patent number: 7998351Abstract: Composition and method of use for tannin based environmentally benign polymeric coagulants are disclosed. Tannin based coagulants are copolymers of naturally occurring tannins and a cationic monomer. One embodiment of the present invention provides for a composition, of a tannin based polymeric coagulant which is comprised of N,N-(dimethylaminoethyl) methacrylate (MADAME) polymerized using t-butylhydroperoxide and sodium metabisulfite. The resulting polyMADAME is converted to hydrochloride and then blended/reacted in an aqueous medium with tannin to obtain a homogenous poly(MADAME)-tannin composition. The method of use comprises adding an amount of the composition effective for the purpose of clarifying oily wastewater from food and beverage, steel, automotive, transportation, refinery, pharmaceutical, metals, paper and pulp, chemical processing and hydrocarbon processing industries.Type: GrantFiled: December 22, 2006Date of Patent: August 16, 2011Inventors: Vinod Kumar Rai, Ashok Shyadligeri, Baraka Kawawa, Abdul Rafi Khwaja, Narain Madhavan
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Patent number: 7981295Abstract: Disclosed is an economical process for the purification of water containing soluble and sparingly soluble inorganic compounds using single-stage or two-stage membrane processes that integrate membrane water purification with chemical precipitation softening and residual hardness and silica removal from the membrane concentrates using ion exchange resins and silica sequestering media, respectively. The purified water recovery is not adversely affected by design and/or operational deficiencies in the chemical precipitation softening system that may result in higher residual hardness and silica in the supernatant from the clarifier.Type: GrantFiled: August 14, 2009Date of Patent: July 19, 2011Inventor: Riad A. Al-Samadi
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Patent number: 7943048Abstract: A method for recovering tallow from meat processing wastewater includes adding a coagulant composition to the wastewater to agglomerate suspended fat, oil and grease particles in the wastewater, separating solid waste materials from the wastewater and isolating tallow from the solid waste materials. The coagulant composition includes tannin.Type: GrantFiled: April 29, 2008Date of Patent: May 17, 2011Assignee: General Electric CompanyInventors: Abdul Rafi Khwaja, Stephen R. Vasconcellos
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Publication number: 20110042321Abstract: Methods for aggregating suspended solid particles in an aqueous medium involving mixing the aqueous medium with an effective amount of a flocculant to aggregate the solid particles to form aggregated solid particles, and optionally separating the aggregated solid particles from the aqueous medium. The flocculant is obtained from animal blood. The pH of the aqueous medium may be adjusted to a pH of about 4.5 to about 5.7 by the addition of at least one acid or acidic buffer. The temperature of the aqueous medium may be adjusted to a temperature range of about 10° to about 50° C.Type: ApplicationFiled: August 19, 2010Publication date: February 24, 2011Inventors: George Piazza, Rafael Garcia
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Patent number: 7875189Abstract: The invention relates to a method for separating suspended solid materials from aqueous systems, in which the latter is mixed with a flocculant made of polymer colloidal particles with cationic surface charge and subsequently the flocculated material is separated from the aqueous system.Type: GrantFiled: March 3, 2006Date of Patent: January 25, 2011Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Leibniz-Institut fur Polymerforschung Dresden e.V.Inventors: Werner Jaeger, Bernd-Reiner Paulke, Simona Schwarz, Mandy Mende
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Publication number: 20110000854Abstract: A method uses anionic and cationic polymers added in, any order or simultaneously, to aqueous media for the removal of substances. The sequential addition of the two biopolymers, anionic xanthan, followed by cationic chitosan, causes the rapid formation of very large and cohesive fibrillar aggregates that may exhibit high solids to liquid ratios and that quickly settle out from the aqueous media. The aqueous media can be easily separated from the large fibrillar aggregates by settling under gravity or by filtration through a porous containment device, such as a synthetic or non-synthetic woven or non-woven fabric including a geotextile fabric or a solid containment device containing a solid mesh screen.Type: ApplicationFiled: July 6, 2010Publication date: January 6, 2011Applicant: HaloSource, Inc.Inventors: Everett J. Nichols, James R. Scott, Jeffrey F. Williams, Yongjun Chen
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Patent number: 7846339Abstract: Boron is removed from an aqueous boron solution by contacting with the aqueous boron solution with a water-soluble cationic polyelectrolyte, and at least one of polyvinyl alcohol and anionic-modified polyvinyl alcohol under an alkaline condition, and then removing the generated coagulation.Type: GrantFiled: June 26, 2006Date of Patent: December 7, 2010Assignee: Kowa Company, Ltd.Inventors: Hironori Suzuki, Katsumi Yabusaki
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Patent number: 7828976Abstract: A process for removing phosphorus from wastewater wherein an iron or aluminum salt is added to the wastewater. The iron or aluminum salt results in the precipitation of certain iron or aluminum species that include phosphorus adsorption sites. These iron or phosphorus species are settled and become a part of sludge produced in the course of the wastewater treatment process. By recycling substantial portions of the sludge, the concentration of these iron or aluminum species in the wastewater is increased. This increased concentration results in the presence of large quantities of unused phosphorus adsorption sites that attract and adsorb phosphorus, resulting in phosphorus being removed from the wastewater.Type: GrantFiled: June 22, 2007Date of Patent: November 9, 2010Assignee: I. Kruger, Inc.Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
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Patent number: 7815804Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.Type: GrantFiled: December 12, 2006Date of Patent: October 19, 2010Assignee: OTV SA S.A.Inventor: LNSP Nagghappan
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Patent number: 7758758Abstract: A method for removing metals from metal-containing acidic mine wastewater uses a basic sludge produced by the method for treating the wastewater. The wastewater is mixed with a lime slurry and with the basic sludge. This mixture is allowed to separate into an aqueous effluent and an acidic sludge. The effluent is mixed with the lime slurry and with a composition containing an iron compound, to produce a mixture. This mixture is allowed to separate into an aqueous effluent and the basic sludge. Lignin derivatives, such as calcium lignosulfonate, may be included in the treatment mixture.Type: GrantFiled: February 28, 2007Date of Patent: July 20, 2010Assignee: Noram Engineering and Constructors Ltd.Inventors: J. Ming Zhuang, Anthony S. Walsh
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Patent number: 7722841Abstract: The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing copper from CMP wastewater. The composition includes a combination of (a) a polymeric chelant derived from a polyamine selected from the group consisting of diethylenetriamine (DETA), triethylenetetraamine (TETA), tertraethylenepentaamine (TEPA), poly[vinylamine], and branched or linear poly[ethylenimine] (PEI); and (b) a water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of methyl chloride or dimethyl sulfate quaternary salt of dimethyl aminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide, and diallyl dimethyl ammonium chloride.Type: GrantFiled: April 25, 2006Date of Patent: May 25, 2010Assignee: General Electric CompanyInventors: Baraka Kawawa, Stephen R. Vasconcellos, William Sean Carey, Nicholas R. Blandford
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Patent number: 7713422Abstract: Lignin and alkali are efficiently sorted out of alkaline black liquor discharged from the paper manufacturing/pulp and paper manufacturing industries and the treated water is made as purified water. Acid is added to the black liquor and its pH is adjusted to 2.5 to 3.5. An aggregating agent is added to have lignin contained in the black liquor settled and the black liquor is separated into lignin and clean water. Ozone gas, preferably in the micro bubble state, is given to the clean water for contact reaction.Type: GrantFiled: September 7, 2005Date of Patent: May 11, 2010Assignee: K.I. System Co., Ltd.Inventors: Sadao Kitagawa, Akira Ako
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Patent number: 7704399Abstract: A system and method for the treatment of water for human consumption using a naturally occurring inorganic catalyst working within a pH range between 3 and 13, combining the inorganic catalyst at 3 parts per million to an oxidant, primarily hydrogen peroxide and a metal salt used as a coagulant and a primary catalyst, resulting in an efficient and economical phasic water purification and filtration system and process. The inorganic catalyst is a zeolite a synthetic zeolite or preferably chabazite.Type: GrantFiled: May 30, 2007Date of Patent: April 27, 2010Inventor: Randy Gene Condit
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Patent number: 7695630Abstract: An ionic conditioning process and molecular arrangement for removing colloids from an aqueous solution, where the aqueous solution is transported to and/or through several conditioning zones for purification. The process utilizes vessels within which stages of conditioning are performed and are monitored. The conditioning processes perform ionic, chemical and physical conditioning to the colloids in the aqueous solution causing the colloids to be transformed into a state that reacts with a polymer flocculating agent and is thereby precipitated rapidly and efficiently for removal. The effluent as well as the precipitate can be further treated with conventional means to meet certain specifications for discharge and disposal.Type: GrantFiled: November 10, 2006Date of Patent: April 13, 2010Inventor: Cesar Ladron de Guevara